# US 12,599,487 B2 · Tools and implants for lateral disc replacement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,599,487 B2 - Document ID: US12599487B2 - Status: Granted - Kind: B2 - Application number: 18/221,849 - Filed: 2023-07-13 - Published: 2025-01-16 - Granted: 2026-04-14 - Earliest claimed: 2023-07-13 - Assignees: Kabushiki Kaisha SG - Applicants: Sg, LLC - Inventors: Paul Glazer; Michael J. Milella, Jr. - Web page: https://patentgrep.com/patent/US12599487B2 ## CPC - A61F 2/4425: {made of articulated components} - A61F 2/4611: {of spinal prostheses} - A61F 2/442: {Intervertebral or spinal discs, e.g. resilient (non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455)} - A61F 2002/30563: {having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers} - A61F 2002/30841: {Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes} - A61F 2002/443: {having two transversal endplates and at least one intermediate component} - A61F 2310/00005: The prosthesis being constructed from a particular material - A61F 2310/00011: Metals or alloys - A61F 2310/00017: Iron- or Fe-based alloys, e.g. stainless steel - A61F 2310/00023: Titanium or titanium-based alloys, e.g. Ti-Ni alloys - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract In accordance with at least one aspect of this disclosure, a disc replacement implant includes, a first endplate configured to engage a vertebral endplate of a first vertebra adjacent an intervertebral space, a second endplate configured to engage a vertebral endplate of a second vertebra opposite the first end plate in the intervertebral space, a core between the first and second endplates, and an annulus surrounding the core and connecting a perimeter of the first endplate to a perimeter of the second end plate. In embodiments, the annulus can include a portion that extends inwardly between the first and second core plates to the spacer. ## Claims ### Claim 1 A disc replacement implant comprising: a first endplate configured to engage a vertebral endplate of a first vertebra adjacent an intervertebral space; a second endplate configured to engage a vertebral endplate of a second vertebra opposite the first end plate in the intervertebral space; a core between the first and second endplates, wherein the core includes a first core plate that engages an inner surface of the first endplate and a second core plate that engages an inner surface of the second endplate, wherein a first pocket is defined between the first endplate and the first core plate, wherein there are a plurality of holes through the first end plate from an external surface of the first endplate into the first pocket for osseointegration; and an annulus surrounding the core and connecting a perimeter of the first endplate to a perimeter of the second end plate. ### Claim 2 (depends on 1) The implant as recited in claim 1, wherein the first endplate and second end plate are metallic. ### Claim 3 (depends on 1) The implant as recited in claim 1, wherein the core is of a material more flexible than that of the first and second endplates. ### Claim 4 (depends on 3) The implant as recited in claim 3, wherein the core is of a polymer material. ### Claim 5 (depends on 3) The implant as recited in claim 3, wherein the annulus is of a material more flexible than that of the core. ### Claim 6 (depends on 5) The implant as recited in claim 5, wherein the annulus is of viscoelastic material. ### Claim 7 (depends on 1) The implant as recited in claim 1, wherein the core includes: a spacer between the first and second core plates, wherein the spacer is connected to each of the first and second core plates and is configured to allow bending and twisting motion of the first and second core plates relative to one another. ### Claim 8 (depends on 7) The implant as recited in claim 7, wherein the spacer includes a spherical section and connects a center portion of the first core plate to a center portion of the second core plate, and has a neutral position that maintains a wedge angle and spacing between the first and second core plates. ### Claim 9 (depends on 7) The implant as recited in claim 7, wherein a second pocket is defined between the second endplate and the second core plate, and wherein there are a plurality of holes through the second endplate from an external surface of the second endplate into the second pocket for osseointegration. ### Claim 10 (depends on 1) The implant as recited in claim 1, further comprising, a spacer between the first and second core plates, wherein the spacer is connected to each of the first and second core plates and is configured to allow bending and twisting motion of the first and second core plates relative to one another; and wherein the annulus includes a portion that extends inwardly between the first and second core plates to the spacer. ### Claim 11 (depends on 1) The implant as recited in claim 1, wherein the first endplate has an external surface defining a plurality of pyramidal teeth, and wherein the second endplate has an external surface defining a plurality of pyramidal teeth. ### Claim 12 (depends on 11) The implant as recited in claim 11, wherein a plurality of the pyramidal teeth of the first endplate have osseointegration holes defined through each pyramidal face thereof, and wherein a plurality of the pyramidal teeth of the second endplate have osseointegration holes defined through each pyramidal face thereof. ### Claim 13 (depends on 12) The implant as recited in claim 12, wherein the first endplate has a biologics aperture therethrough from the external surface of the first endplate into a pocket, wherein the biologics aperture is larger in diameter than the osseointegration holes, for introduction of osseointegration biologics into the first pocket. ### Claim 14 (depends on 1) The implant as recited in claim 1, wherein an inserter pocket is defined on a first end of the first endplate, second endplate, and annulus, wherein the inserter pocket includes a first recess defined on an inward facing surface of the first end plate, and wherein the inserter pocket includes a second recess defined on an inward facing surface of the second end plate. ### Claim 15 (depends on 14) The implant as recited in claim 14, wherein the inserter pocket is defined on a first lateral end of the first endplate, the second endplate, and the annulus, wherein the first endplate, second end plate, and annulus have a length from the first lateral end to an opposite second lateral end thereof that is greater than a width measured from a front side of the first and second endplates and annulus to a back side thereof to facilitate implantation through a lateral approach.